<template>
  <transition name="slide">
    <music-list :title="title" :bg-image="bgImage" :songs="songs" :rank="rank"></music-list>
  </transition>
</template>
<script type="text/ecmascript-6">
import MusicList from 'components/music-list/music-list'
import {
  mapGetters
} from 'vuex'
import {
  getMusicList
} from 'api/rank'
import {
  ERR_OK
} from 'api/config'
import {
  createSong
} from 'common/js/song'

export default {
  computed: {
    title() {
      return this.topList.topTitle
    },
    bgImage() {
      if (this.songs.length) {
        return this.songs[0].image
      }
      return '' // this.topList.picUrl
    },
    ...mapGetters(['topList'])
  },
  created() {
    this._getMusicList()
  },
  data() {
    return {
      songs: [],
      rank: true
    }
  },
  methods: {
    _getMusicList() {
      if (!this.topList.id) {
        this.$router.push('/rank')
        return
      }
      getMusicList(this.topList.id).then((res) => {
        if (res.code === ERR_OK) {
          this.songs = this._normalizeSongs(res.songlist)
        }
      })
    },
    _normalizeSongs(list) {
      let ret = [];
      list.forEach((item) => {
        let musicData = item.data;
        if (musicData.songid && musicData.albummid) {
          ret.push(createSong(musicData))
        }
      })
      return ret
    }
  },
  components: {
    MusicList
  }
}
</script>
<style lang="scss" scoped>
.slide-enter-active,
.slide-leave-active {
  transition: all 0.3s ease;
}

.slide-enter,
.slide-leave-to {
  transform: translate3d(100%, 0, 0);
}
</style>
